I thought this would be trivial, but I can't find a package or function
that does this.
I'm hoping someone can guide me to one.
Imagine a simple case with two survival curves (e.g. treatment & control).
I just want to calculate the difference in KM estimates at a specific time
point (e.g. 1 year) plus the estimate's 95% CI. The former is
straightforward, but the estimates not so much.
I know methods exist such as Parzen, Wei, and Ying, but was surprised not
to find a package that included this.
Before I code it up, I thought I'd ask if I was just missing it somewhere.
Thank you
Jason
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